#include <stdio.h> #include <math.h> int main() { double a,b,c,r,h,s; scanf("%lf %lf %lf",&a,&b,&r); r=r/180.0*M_PI; c=sqrt(a*a+b*b-2*a*b*cos(r)); h=b*sin(r); s=a*h/2.0; printf("%lf\n%lf\n%lf\n",s,a+b+c,h); }